adding example on spanning element

Author: howcome

css-multicol/Overview.src.html

@@ -292,10 +292,6 @@ <h2>The multi-column model</h2>
 multi-column element is paginated, the height of each row is
 constrained by the page and the content continues in a new row of
 column boxes on the next page; a column box never splits across pages.
-The same effect occurs when a <em>spanning element</em> divides the
-multi-column element: the columns before the spanning element are
-balanced and shortened to fit their content. Content after the
-spanning element then flows into a new row of column boxes.
 
 
 <div class="example">
@@ -362,6 +358,65 @@ <h2>The multi-column model</h2>
 <div class=gap style="left: 325px"></div>
 </div>
 
+
+<p>The same effect occurs when a <em>spanning element</em> divides the
+multi-column element: the columns before the spanning element are
+balanced and shortened to fit their content. Content after the
+spanning element then flows into a new row of column boxes.
+
+<div class="example">
+
+<div class=cols>
+
+<p>Ab cde fgh i jkl. Mno<br> 
+pqr stu vw xyz. A bc<br>
+
+<br><br>
+
+M nop qrst uv wx yz.<br>
+Ab cde fgh i jkl. Mno<br> 
+pqr stu vw xyz. A bc<br>
+def g hij klm nopqrs<br>
+tuv wxy z. Abc de fg<br>
+hi jklmno. Pqrstu vw<br>
+
+
+
+<div class="col" style="left: 175px">
+<p>def g hij klm nopqrs<br> 
+tuv wxy z. Abc de fg<br>
+<br><br>
+x yz. Abc def ghi jkl.<br>
+M nop qrst uv wx yz.<br>
+Ab cde fgh i jkl. Mno<br> 
+pqr stu vw xyz. A bc<br>
+def g hij klm nopqrs<br>
+tuv wxy z. Abc de fg<br>
+
+
+</div>
+
+<div class="col" style="left: 350px">
+<p>
+hi jklmno. Pqrstu vw<br>
+x yz. Abc def ghi jkl.<br>
+<br><br>
+hi jklmno. Pqrstu vw<br>
+x yz. Abc def ghi jkl.<br>
+M nop qrst uv wx yz.<br>
+Ab cde fgh i jkl. Mno<br> 
+pqr stu vw xyz.
+
+</div>
+
+
+<div class=rep style="width: 490px; height: 20px; background: silver; font-size: 1.5em; padding: 5px">An spanning element</div>
+<div class=gap style="left: 150px"></div>
+<div class=gap style="left: 325px"></div>
+</div>
+</div>
+
+
 <!--
 <p>To illustrate the effects of the various properties described in
 this specification, variations on a sample document will be used. Here